KR20090046120A - Illumination apparatus using light emitting diodes - Google Patents

Illumination apparatus using light emitting diodes Download PDF

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Publication number
KR20090046120A
KR20090046120A KR1020070112082A KR20070112082A KR20090046120A KR 20090046120 A KR20090046120 A KR 20090046120A KR 1020070112082 A KR1020070112082 A KR 1020070112082A KR 20070112082 A KR20070112082 A KR 20070112082A KR 20090046120 A KR20090046120 A KR 20090046120A
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KR
South Korea
Prior art keywords
reflector
light
led
elliptical
lighting
Prior art date
Application number
KR1020070112082A
Other languages
Korean (ko)
Inventor
라진호
Original Assignee
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020070112082A priority Critical patent/KR20090046120A/en
Publication of KR20090046120A publication Critical patent/KR20090046120A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single light source
    • F21V7/0033—Combination of two or more reflectors for a single light source with successive reflections from one reflector to the next or following
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0066—Reflectors for light sources specially adapted to cooperate with point like light sources; specially adapted to cooperate with light sources the shape of which is unspecified
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/08—Optical design with elliptical curvature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S362/00—Illumination
    • Y10S362/80—Light emitting diode

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Introducing the lighting device using LED that can get high efficiency lighting effect. The lighting apparatus includes a plurality of LEDs for emitting light on one plane; A first reflector disposed in front of the LED and reflecting light of the LED to one shared focus through a plurality of elliptical reflectors; And a second reflector disposed opposite to the elliptical reflector of the first reflector and reflecting light passing through the shared focus to the front. Such a lighting device can simplify component placement design and structure, is suitable for commercialization and miniaturization design, and can achieve high brightness and high efficiency lighting effect without shadow superimposition effect, and forward parallel light or spread light forward. I can illuminate.

LED, lighting, oval reflector, parabolic reflector, parallel light

Description

Lighting Apparatus Using Light Emitting Diodes

The present invention relates to an illumination device that condenses light from one or more LEDs to illuminate the front.

In general, LED (LED) is a device that emits light using a semiconductor. Light from the LED is emitted at a wide range of angles, and such a large diverging angle of the light makes it more difficult to collect and illuminate it.

Such LEDs have high optical efficiency, small size, and long life compared to ordinary bulbs. In addition, it generates less heat, easier to control light, less current consumption, and better use efficiency than ordinary light bulbs.

LEDs, on the other hand, are inferior in quantity of light, are expensive, and require a combination of several light sources.

1 shows a lighting device 100 using a plurality of LEDs according to the prior art.

As shown in FIG. 1, the conventional lighting device 100 is intended to be used as a luminaire by using a plurality of reflectors to compensate for LEDs that lack a sufficient amount of light. Such a conventional lighting device 100 includes a plurality of LEDs 110. ), And a heat sink 120 is mounted on each of the rear surfaces thereof, and a plurality of elliptical reflectors 130 are mounted on the front side of each LED 110 to condense light toward the front of the reflector 130. It was supposed to reflect.

The reflector 130 used in the conventional lighting device 100 is an elliptical reflector having an elliptical cross section, such an elliptical reflector 130 has a light reflecting characteristic as shown in FIG. That is, the light originating from any first focus 132 located inside the general ellipsoidal reflector 130 is reflected by the ellipsoidal reflector 130 and exits to the outside via the second second focus 134 in common. Has an optical principle.

Accordingly, the conventional lighting apparatus 100 as described above has a plurality of elliptical reflectors 130 assigned to each LED 110, and each of the LEDs 110 forwards light using the reflectors 130. Since the reflectors 130 each have unique second focal points 134 in the process of reflecting the light through the light, the light emitted forward through the second focal points 134 from the reflector 130 is focused on a predetermined area. To get the lighting effect.

Therefore, although the conventional lighting device 100 obtains the lighting effect using a plurality of LEDs 110, there are some problems to be solved in order to be commercialized.

First, since the light emitted from the LEDs 110 is reflected forward through the elliptical reflectors 130 disposed on the rear surface of the conventional structure, the path of the light traveling forward from the reflector 130 is improved. The LED 110, the heat sink 120, and a circuit board (wir) (not shown) are exposed. Thus, such a conventional structure places great restrictions on the design and layout of the various components.

In addition, the plurality of LEDs 110 should be arranged in three dimensions in an inclined state rather than one plane, and the heat sink 120 should be arranged for each LED 110. Such a structure also requires a large design. This makes it difficult to place parts.

In addition, in the conventional lighting device 100, the light reflected forward through the reflector 130 from each LED 110 is illuminated forward after passing through the second focus 134 for each reflector 130 Therefore, after passing through the second focus 134 is illuminated forward in a wide unfolded state, accordingly there is a problem that it is difficult to intensively illuminate any one of the front. In addition, since the plurality of second focusing points 134 exist for each reflector 130, and light is overlapped and illuminated in different directions through the reflectors 130, so-called shadow overlapping effect occurs, and thus the brightness of the light illuminated forward is lowered. It was not possible to obtain a lighting effect to secure a bright field of view.

The present invention is to solve the above conventional problems, the purpose is to illuminate by using a plurality of LEDs and reflectors, the LED and the heat sink is disposed on a single plane, to be disposed away from the path of the light toward the front It is to provide a lighting device using LED suitable for commercialization and miniaturization design by simplifying the component arrangement design and structure.

And another object of the present invention is to provide a lighting device using the LED to the light emitted from a plurality of LEDs to obtain the same effect as the light from one light source without the shadow overlap effect to obtain a high brightness and high efficiency lighting effect To provide.

In another aspect, the present invention is to provide a lighting apparatus using an LED that can effectively control not only parallel light but also spread light.

Illumination apparatus according to the present invention for achieving the above object, a lighting device using an LED and a reflector, a plurality of LEDs for emitting light on one plane; A first reflector disposed in front of the LED and reflecting the light of the LED to a single shared focus through a plurality of elliptical reflectors; And a second reflector disposed opposite to the elliptical reflector of the first reflector and reflecting light passing through the shared focus forward.

The first reflector reflects light to the shared focal point in which elliptical reflectors correspond to respective LEDs.

In addition, the second reflector reflects light forward through a central space in which elliptical reflectors of the first reflector are disposed.

In addition, the second reflector is made of one parabolic reflector to reflect parallel light forward.

In addition, the second reflector is made of one elliptical reflector to reflect the light spread to the front.

The lighting apparatus using the LED according to the present invention arranges a plurality of LEDs, heat sinks and circuit boards on one plane, away from the path of the light forward, and forwards from the LEDs through the first and second reflectors. By reflecting the light, the component arrangement design and structure can be simplified, and the effect suitable for commercialization and miniaturization design can be obtained.

In addition, the lighting apparatus using the LED according to the present invention is one by allowing the light emitted from the plurality of LEDs to pass through a single shared focus through the elliptical reflectors of the first reflecting portion, and reflected forward from the shared focus through the second reflecting portion It is possible to obtain the same effect as the light emitted from the light source of the high brightness and high efficiency lighting effect without shadow overlay effect can be obtained.

In addition, the present invention can not only illuminate parallel light forward by arranging the parabolic reflector in the second reflector, but also effectively control the spread light by disposing an elliptical reflector in the second reflector.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 3, the lighting apparatus 1 using the LED according to the present invention includes a plurality of LEDs 10 that emit light on one plane. The LEDs 10 mount the heat sink 20 and the circuit boards on the rear surface thereof. The LED 10, the heat sink 20, and the circuit boards (not shown) are disposed on one plane P, Preferably, it may be arranged at intervals such as circumferential direction on one plane (P).

Therefore, in such a structure, it is more convenient to align or arrange the parts than the conventional three-dimensional arrangement structure.

In addition, the present invention includes a first reflecting portion 30 in front of the LED 10, the first reflecting portion 30 is arranged a plurality of elliptical reflectors 32 in front of the LED 10, The structure of reflecting the light of the LED 10 to one shared focus (C).

The elliptical reflectors 32 of the first reflector 30 are disposed in front of each of the LEDs 10, and each of the elliptical reflectors 32 shares light emitted from the LED 10 with one shared focus. And the shared focus C is formed in the center where the elliptical reflectors 32 are located.

In such a structure, if the elliptical reflectors 32 of the first reflector 30 are arranged in a circular shape, the shared focus C is formed at the center of the circular space of the elliptical reflector 32.

In addition, the lighting apparatus 1 using the LED according to the present invention includes a second reflector 40 disposed to face the elliptical reflector 32 of the first reflector 30. ) Reflects the light passing through the shared focus C forward.

The second reflector 40 is a structure that reflects light forward through the central space in which the elliptical reflectors 32 of the first reflector 30 are disposed, and the shared focus of the elliptical reflectors 32 ( In the structure formed in the center of the circular space of the elliptical reflector 32, the second reflecting portion 40 is disposed adjacent thereto, and the arrangement of the components is reduced by reflecting the light forward through the center of the circular space 36. It can be designed compactly.

The second reflector 40 may be formed of one parabolic reflector 42 or an elliptical reflector 45. In the case of the parabolic reflector 42, as shown in FIG. B1) will be reflected.

That is, when the second reflector 40 is formed of the parabolic reflector 42, the light passing through the shared focus C is reflected by the parallel light B1 toward the front from the inner surface of the parabolic reflector 42. Has Therefore, the lighting device 1 using the LED according to the present invention can be used as a parallel light device for illuminating the parallel light (B1).

In addition, the second reflector 40 may be formed of one elliptical reflector 45. In this case, as shown in FIG. 5, the light passing through the shared focus C may be formed of the elliptical reflector 45. It has a characteristic of reflecting spreading light B2 from the inner surface toward the front. Therefore, the lighting device 1 using the LED according to the present invention can also be used as a device for illuminating the spread light (B2).

In the lighting apparatus 1 using the LED according to the present invention configured as described above, when a plurality of LEDs 10 arranged on one plane P emit light, these lights are allocated to each LED 10 and arranged. Through the plurality of elliptical reflectors 32, light is reflected and passed through one shared focus C.

Accordingly, the light emitted from the LED 10 passes through the shared focus C, and the shared focus C plays a role of a general light source.

The light passing through the shared focus C is reflected forward by the second reflector 40 disposed to face the elliptical reflector 32 of the first reflector 30. If 40 is made of parabolic reflector 42, parallel light B1 is reflected forward, and if it is made of elliptical reflector 45, spread light B2 is reflected forward.

Through this process, the present invention may arrange the plurality of LEDs 10, the heat sinks 20, and the circuit boards (not shown) on one plane P, and may be disposed away from the path of the light toward the front. Through the first reflector 30 and the second reflector 40, the light is reflected from the LED 10 forwardly. Therefore, through such a structure, the component arrangement design and structure of the LED 10, the heat sink 20, and the circuit boards can be simply configured, and have a structure suitable for commercialization and miniaturization.

In the lighting apparatus 1 using the LED according to the present invention, light emitted from the plurality of LEDs 10 passes through one shared focus C through the elliptical reflectors 32 of the first reflector 30. In the process of reflecting forward from the shared focus C through the second reflector 40, the shared focus C acts as a single light source and passes through the shared focus C. The light can achieve the same effect as the light from one light source. Therefore, the light reflected forward through the second reflector 40 does not generate a shadow overlap effect, and a high-efficiency lighting effect with high luminous intensity can be obtained.

As described above, the present invention can not only illuminate the parallel light B1 straight ahead by disposing the parabolic reflector 42 in the second reflecting portion 40, but also spreads the light by arranging the elliptical reflector 45 ( It is possible to illuminate B2) forward, thus enabling effective control of the light source.

1 is a block diagram showing a lighting apparatus using the LED according to the prior art;

2 is an explanatory diagram showing a path in which light is reflected by a general elliptical reflector;

3 is a block diagram showing a structure having a first reflecting portion of the elliptical reflector and a second reflecting portion of the parabolic reflector in the lighting apparatus using the LED according to the present invention;

4 is an explanatory diagram showing a path in which light is reflected by a parabolic reflector applied to an LED lighting apparatus according to the present invention;

5 is a block diagram illustrating a structure having a first reflecting portion of the elliptical reflector and a second reflecting portion of the elliptical reflector in the lighting apparatus using the LED according to the present invention.

<Description of Symbols for Major Parts of Drawings>

10 .... LED 20 .... Heatsink

30 .... First Reflector 32 .... Oval Reflector

36 .... center of circular space 40 .... second reflector

42 .... Parabolic Reflector 45 .... Elliptical Reflector

100 .... Lighting device using conventional LED

110 .... LED 120 .... Heat Sink

130 .... Reflector 132 .... First Focus

134 .... second focus B1 .... parallel light

B2 .... Spread Optical C ..... Shared Focus

P .... flat

Claims (5)

In the lighting device using the LED and the reflector, A plurality of LEDs emitting light on one plane; A first reflector disposed in front of the LED and reflecting light of the LED to one shared focus through a plurality of elliptical reflectors; And And a second reflector disposed opposite to the elliptical reflector of the first reflector and reflecting light passing through the shared focus to the front. According to claim 1, wherein the first reflector is an illumination device using an LED, characterized in that the elliptical reflectors reflect the light to the shared focus corresponding to each LED. The lighting apparatus of claim 1, wherein the second reflector reflects light forward through a central space in which elliptical reflectors of the first reflector are disposed. 4. The lighting apparatus of claim 3, wherein the second reflector comprises one parabolic reflector to reflect parallel light forward. According to claim 3, wherein the second reflector is an illumination device using an LED, characterized in that consisting of one elliptical reflector to reflect the spreading light forward.
KR1020070112082A 2007-11-05 2007-11-05 Illumination apparatus using light emitting diodes KR20090046120A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8115369B2 (en) 2009-11-09 2012-02-14 Lg Innotek Co., Ltd. Lighting device
KR101114095B1 (en) * 2009-11-09 2012-03-14 엘지이노텍 주식회사 Lighting device
KR101144453B1 (en) * 2009-11-09 2012-05-11 엘지이노텍 주식회사 Lighting device
CN103032818A (en) * 2011-09-29 2013-04-10 起亚自动车株式会社 Double reflecting structure
US8471443B2 (en) 2009-11-09 2013-06-25 Lg Innotek Co., Ltd. Lighting device
US8573802B2 (en) 2009-11-09 2013-11-05 Lg Innotek Co., Ltd. LED lighting device for indirect illumination
CN103499067A (en) * 2013-10-11 2014-01-08 复旦大学 Symmetrical structured LED light-total-reflection collimation system with theoretically lossless lighting effects
CN103869490A (en) * 2014-03-18 2014-06-18 中国科学院西安光学精密机械研究所 Full-waveband point light source collimation optical system
US9562680B2 (en) 2009-11-09 2017-02-07 LG Innotek., Ltd. Lighting device
CN108351084A (en) * 2016-11-22 2018-07-31 Zkw集团有限责任公司 The lighting device of motor vehicle searchlight
CN109695853A (en) * 2017-10-20 2019-04-30 法雷奥照明湖北技术中心有限公司 Lighting device and motor vehicles
JP2020098724A (en) * 2018-12-18 2020-06-25 スタンレー電気株式会社 Vehicular lighting fixture

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863117A3 (en) * 2009-11-09 2015-06-10 LG Innotek Co., Ltd. Lighting device
US8471443B2 (en) 2009-11-09 2013-06-25 Lg Innotek Co., Ltd. Lighting device
KR101144453B1 (en) * 2009-11-09 2012-05-11 엘지이노텍 주식회사 Lighting device
US9562680B2 (en) 2009-11-09 2017-02-07 LG Innotek., Ltd. Lighting device
US8115369B2 (en) 2009-11-09 2012-02-14 Lg Innotek Co., Ltd. Lighting device
US8573802B2 (en) 2009-11-09 2013-11-05 Lg Innotek Co., Ltd. LED lighting device for indirect illumination
KR101114095B1 (en) * 2009-11-09 2012-03-14 엘지이노텍 주식회사 Lighting device
US9200761B2 (en) 2009-11-09 2015-12-01 Lg Innotek Co., Ltd. Lighting device for indirect illumination
CN103032818B (en) * 2011-09-29 2016-05-04 起亚自动车株式会社 Bireflectance structure
CN103032818A (en) * 2011-09-29 2013-04-10 起亚自动车株式会社 Double reflecting structure
CN103499067A (en) * 2013-10-11 2014-01-08 复旦大学 Symmetrical structured LED light-total-reflection collimation system with theoretically lossless lighting effects
CN103869490A (en) * 2014-03-18 2014-06-18 中国科学院西安光学精密机械研究所 Full-waveband point light source collimation optical system
CN108351084A (en) * 2016-11-22 2018-07-31 Zkw集团有限责任公司 The lighting device of motor vehicle searchlight
CN108351084B (en) * 2016-11-22 2020-07-10 Zkw集团有限责任公司 Lighting device for motor vehicle searchlight
CN109695853A (en) * 2017-10-20 2019-04-30 法雷奥照明湖北技术中心有限公司 Lighting device and motor vehicles
JP2020098724A (en) * 2018-12-18 2020-06-25 スタンレー電気株式会社 Vehicular lighting fixture

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